1 /*
2 * Copyright (c) 2011, 2017, Oracle and/or its affiliates. All rights reserved.
3 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
4 *
5 * This code is free software; you can redistribute it and/or modify it
6 * under the terms of the GNU General Public License version 2 only, as
7 * published by the Free Software Foundation.
8 *
9 * This code is distributed in the hope that it will be useful, but WITHOUT
10 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
11 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
12 * version 2 for more details (a copy is included in the LICENSE file that
13 * accompanied this code).
14 *
15 * You should have received a copy of the GNU General Public License version
16 * 2 along with this work; if not, write to the Free Software Foundation,
17 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
20 * or visit www.oracle.com if you need additional information or have any
21 * questions.
22 */
23 import java.io.BufferedInputStream;
24 import java.io.IOException;
25 import java.io.OutputStreamWriter;
26 import java.io.PrintWriter;
27 import java.net.ServerSocket;
28 import java.net.Socket;
29 import java.nio.charset.StandardCharsets;
30 import java.util.ConcurrentModificationException;
31 import java.util.Hashtable;
32 import javax.naming.Context;
33 import javax.naming.InitialContext;
34 import javax.naming.NamingException;
35 import javax.naming.event.EventContext;
36 import javax.naming.event.NamingEvent;
37 import javax.naming.event.NamingExceptionEvent;
38 import javax.naming.event.NamingListener;
39 import javax.naming.event.ObjectChangeListener;
40
41 /**
42 * @test @bug 8176192
43 * @summary Incorrect usage of Iterator in Java 8 In com.sun.jndi.ldap.
44 * EventSupport.removeNamingListener
45 * @modules java.naming
46 * @run main RemoveNamingListenerTest
47 */
48 public class RemoveNamingListenerTest {
49
50 private static Exception exception;
51
52 public static void main(String args[]) throws Exception {
53 // start the LDAP server
54 TestLDAPServer server = new TestLDAPServer();
55 server.start();
56
57 // Set up environment for creating initial context
58 Hashtable<String, Object> env = new Hashtable<>(3);
59 env.put(Context.INITIAL_CONTEXT_FACTORY, "com.sun.jndi.ldap.LdapCtxFactory");
60 env.put(Context.PROVIDER_URL, "ldap://localhost:" + server.getPort() + "/o=example");
61 env.put("com.sun.jndi.ldap.connect.timeout", "2000");
62 EventContext ctx = null;
63
64 try {
65 ctx = (EventContext) (new InitialContext(env).lookup(""));
66 String target = "cn=Vyom Tewari";
67
68 // Create listeners
69 NamingListener oneListener = new SampleListener();
70 NamingListener objListener = new SampleListener();
71 NamingListener subListener = new SampleListener();
72
73 // Register listeners using different scopes
74 ctx.addNamingListener(target, EventContext.ONELEVEL_SCOPE, oneListener);
75 ctx.addNamingListener(target, EventContext.OBJECT_SCOPE, objListener);
76 ctx.addNamingListener(target, EventContext.SUBTREE_SCOPE, subListener);
77
78 //remove a listener in different thread
79 Thread t = new Thread(new RemoveNamingListener(ctx, subListener));
80 t.start();
81 t.join();
82
83 if (exception != null) {
84 throw exception;
85 }
86 System.out.println("Test run OK!!!");
87 } finally {
88 if (ctx != null) {
89 ctx.close();
90 }
91 server.stopServer();
92 }
93 }
94
95 /**
96 * Helper thread that removes the naming listener.
97 */
98 static class RemoveNamingListener implements Runnable {
99
100 final EventContext ctx;
101 final NamingListener listener;
102
103 RemoveNamingListener(EventContext ctx, NamingListener listener) {
104 this.ctx = ctx;
105 this.listener = listener;
106 }
107
108 @Override
109 public void run() {
110 try {
111 ctx.removeNamingListener(listener);
112 } catch (NamingException | ConcurrentModificationException ex) {
113 exception = ex;
114 }
115 }
116 }
117
118 static class SampleListener implements ObjectChangeListener {
119
120 @Override
121 public void objectChanged(NamingEvent ne) {
122 //do nothing
123 }
124
125 @Override
126 public void namingExceptionThrown(NamingExceptionEvent nee) {
127 //do nothing
128 }
129 }
130 }
131
132 class TestLDAPServer extends Thread {
133
134 private final int LDAP_PORT;
135 private final ServerSocket serverSocket;
136 private volatile boolean isRunning;
137
138 TestLDAPServer() throws IOException {
139 serverSocket = new ServerSocket(0);
140 isRunning = true;
141 LDAP_PORT = serverSocket.getLocalPort();
142 setDaemon(true);
143 }
144
145 public int getPort() {
146 return LDAP_PORT;
147 }
148
149 public void stopServer() {
150 isRunning = false;
151 if (serverSocket != null && !serverSocket.isClosed()) {
152 try {
153 // this will cause ServerSocket.accept() to throw SocketException.
154 serverSocket.close();
155 } catch (IOException ignored) {
156 }
157 }
158 }
159
160 @Override
161 public void run() {
162 try {
163 while (isRunning) {
164 Socket clientSocket = serverSocket.accept();
165 Thread handler = new Thread(new LDAPServerHandler(clientSocket));
166 handler.setDaemon(true);
167 handler.start();
168 }
169 } catch (IOException iOException) {
170 //do not throw exception if server is not running.
171 if (isRunning) {
172 throw new RuntimeException(iOException);
173 }
174 } finally {
175 stopServer();
176 }
177 }
178 }
179
180 class LDAPServerHandler implements Runnable {
181
182 private final Socket clientSocket;
183
184 public LDAPServerHandler(final Socket clientSocket) {
185 this.clientSocket = clientSocket;
186 }
187
188 @Override
189 public void run() {
190 BufferedInputStream in = null;
191 PrintWriter out = null;
192 byte[] bindResponse = {0x30, 0x0C, 0x02, 0x01, 0x01, 0x61, 0x07, 0x0A, 0x01, 0x00, 0x04, 0x00, 0x04, 0x00};
193 byte[] searchResponse = {0x30, 0x0C, 0x02, 0x01, 0x02, 0x65, 0x07, 0x0A, 0x01, 0x00, 0x04, 0x00, 0x04, 0x00};
194 try {
195 in = new BufferedInputStream(clientSocket.getInputStream());
196 out = new PrintWriter(new OutputStreamWriter(
197 clientSocket.getOutputStream(), StandardCharsets.UTF_8), true);
198 while (true) {
199
200 // Read the LDAP BindRequest
201 while (in.read() != -1) {
202 in.skip(in.available());
203 break;
204 }
205
206 // Write an LDAP BindResponse
207 out.write(new String(bindResponse));
208 out.flush();
209
210 // Read the LDAP SearchRequest
211 while (in.read() != -1) {
212 in.skip(in.available());
213 break;
214 }
215
216 // Write an LDAP SearchResponse
217 out.write(new String(searchResponse));
218 out.flush();
219 }
220 } catch (IOException iOException) {
221 throw new RuntimeException(iOException);
222 } finally {
223 if (in != null) {
224 try {
225 in.close();
226 } catch (IOException ignored) {
227 }
228 }
229 if (out != null) {
230 out.close();
231 }
232 if (clientSocket != null) {
233 try {
234 clientSocket.close();
235 } catch (IOException ignored) {
236 }
237 }
238 }
239 }
240 }